Pulverizer



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UNITED STATES PATENT Orrioe.

WILLIAM S. SH ARPNEUK, OF BLAIR, NEBRASKA, AS SIGFIOR OF ONE-HALF TOALEXANDER MAJORS, OF SAME PLACE.

PU'LVERIZER.

SPECIFICATION forming part of Letters Patent No. 255,590, dated April 4,18 82.

Application filed February 6, 1882. (No model.)

To all whom it may concern Be it known that I, WVILLIAH S. SHARP NECK, acitizen of the United States, residing at Blair. in the county ofWashington and State ofNebraska, have invented certain new and usefulImprovements in Pulverizers; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, refer ence being had tothe accompanying drawings, and to theletters and figures of reference marked thereon,which form a partof thisspecification.

This invention relates to new and useful improvementsin that class ofpulverizers in which the'material is pulverized by being thrownviolently against fixed or moving surfaces by centrifugal force; and itconsists in the peculiar construction, combination, and operation ofparts, as more fully hereinafter described and claimed.

In the drawings, Figure 1 represents a vertical partly sectional view ofmy pulverizer;

2 Fig. 2, an end view, with one of the heads and its attachments removedand with one of the arms in section; and Fig.3, a view on a smallerscale, showingthe device connected with a floor above it by a pipe forelevating purposes.

0 A represents a suitable base supporting the circular case B, which issupplied with interior chilled iron sections, a, a a. These sections aresecurely held in place by the heads 0 G, which are bolted to the case Bat each side of 5 the latter, and can be renewed when worn. To each ofthe heads 0 is bolted a bracket, D, which is provided with journal-boxesb, and with a hollow casting, D.

E E are hollow shafts revolving in the boxes o 1), and provided at theirinner ends with hol-1.

low hubs c, which carry hollow radial arms d. The outer ends of thehollow shafts revolve in recesses in the castings D,which are eachprovided with a hopper, F, so as to give direct 5 communication betweenthe hoppers and the interior of the case B. To one of the heads 0 issecured an outlet, G,which is provided with an upper passage, 6, and alower inclined passage, e, giving it communication with the case at thetop and near the ceiitcr of the same.

The lower opening, 0, extends entirely through the outlet, and isprovided with a valve, f, to limit its size. When in use the outlet isprovided with a pipe, as shown in Fig. 3, said pipe leading to a floororfioors above or to any suitable and desired place. Motion is given tothe hollow shafts by means of belts running on the pulleys g, and drivethe latter and their shafts in opposite directions.

The operation of the machine is as follows: 6) Motion being given to thehollow shafts so as to drive them in opposite directions at a speed offrom one thousand eight hundred to three thousand revolutions, to aminute, the broken ore or grain to be pulverized is placed in the 6hoppers E and fin'ds its way through the hollow shafts to the hubs ontheir inner ends, where the rapid revolutions of said hubs and armscauses the material to be thrown forcibly through the hollow armsagainst the chilled sections a, forming the inner surface of the case B,by centrifugal force, so as to completely pulverize the material. Theaction of the arms causes a strong suction through the hollow shafts anda correspondingly strong blast through the upper passage, 0, whichforcibly draws the material into the case and forces it outward in afinely-pulverized condition through the outlet to a floor above or otherplace for further treatment. The valve f of the passage 0 is used toregulate the amount of air drawn through the hollow shafts. This isaccomplished by admitting a regulated quantity of air into the passage0, so as to limit the amount of suction through the hollow shafts. Anyportions of the material which are not pulverized (more especially whenore is being treated) is again struck by the arms and again thrownagainst the chilled sections, and any portions not pulverizedsufficiently which may go be drawn through the upper passage, c,willfall through the return-passage It and be again drawn into the lowerpassage by suction and again thrown against the case. To insure the lastaction described the lower passage is made 9 5 inclined. The hoppers maybe provided with any suitable valves or cutoffs for regulating thesupply of ore, grain, or other material.

The machine not only pulverizes the material in a very perfect manner,but also elevates or conveys it to other places for further treatment,and is equally successful in pulverizing ore or grain, as has beenproved by actual practice, the action being especially perfected by themovement of the arms in opposite directions, which not only throws thematerial against the walls of the case but also throws the particlesagainst each other in theirtravel. From this it will be seen that thetwo independent sets of arms not only increases the capaeityof themachine, owing to their number, but also by causing the particles tostrike forcibly against each other as they pass in opposite directionThe hollow arms of each shaft may be set inclined toward the arms of theopposite shaft, whereby the pieces of material will be more likely tostrike each other as they rebound from the chilled surface; or the armsmay be made so short that when inclined toward each other the pieces ofore as they issue from the arms may cross each others paths, and thuscause someof the pieces to strike against each other, by whichmeans'much of the ore or other material may be broken up before itreaches the chilled sections. The hollow arms on each shaft may also beset at different angles to their shaft, whereby the material from eacharm will strike at adifferent place on the chilled sections, and thusmore equally distribute the material being pulverizedover the surface ofthe casing. The inclination of the hollow arms is shown in dotted linesin Fig. 1.

In operating on some classes of materials I intend to insert screws orspiral ribs in the hollow shafts, which as they revolve will feed thematerial into the hubs where the centrifugal force comes into play; butfor most purposes this is unnecessary, as the passage of the air as itis drawn in by the cen trifugal force generated by the rotation of thearms is fully sufficient to feed in the material.

I do not limit myself to the exact construction here shown, as it may bevaried without changing the spirit of my invention. For instance, arevolving disk or other instrument provided with passages or exits mightbe mounted on the hollow shaft in the casing and operate to produce thesame results.

What I claim as new is- 1. The combination, with the case B, of theindependent sets of hollow arms revolving therein in oppositedirections, and means,snbstantially as described, for supplying thematerial to said arms, as and for the purpose specified.

2. The combination, with the case B and the hollow arms revolvingtherein, of the hollaw shafts communicating with and carrying said arms,and suitable feeding devices, sub"- stantially as and for the purposespecified.

3. The eoinbinatioinwith the case B, of hollow arms secured at an angleto their operating shafts and revolving within the casein oppositedirections, and suitable feeding devices,

substantially as and for the purpose specified.

4. The combination, in a pulverizer, of an outer case, suitable feedingdevices, and a hollow revolving shaft with a revolving instrumentmounted upon said shaft and provided with passages running from thepassage through the hollow shalt toward the periphery of the case,substantiallyas described, and for the purpose specified. I

5. The combination, with the case B, the hollow arms revolving therein,and the shafts E, of the brackets D, provided with the boxes b b, andhollow castings D, substantially as and for the purpose specified.

6. The combination, with the case B, of the I hollow arms 61, the shaftsE, the outlet G, and suitable means for feeding material and forregulating the amount of air admitted to the case, as and for thepurpose specified.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM S. SHARPNEOK. Witnesses:

W. T. JOHNSON, O. H. MILLER.

